SGEN software component clarification

Hi,

End users have come back to us on an upgraded EHP6 FOR SAP ERP 6.0 system saying a specific transaction, CK40N, is compiling. Due to time constraints we are trying to avoid running SGEN on every component on the system and the REPLIST file doesn't exist in the work directory. Is there a way to pin down what software component a specific transaction or program would be included in?

Thanks,

Russ